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代替的にドーピングされたスピロビス ((フェナリニル) ボロン基質の分子固体の電気伝導性が向上しました

Sushanta K Pal¹, Pradip Bag, Mikhail E Itkis

¹Department of Chemistry and Chemical & Environmental Engineering, University of California , Riverside, California 92521, United States.

Journal of the American Chemical Society

|October 2, 2014

まとめ

有機導管をベリリウム ([PLY(O,O) ]2Be) でドーピングすると,ボロン ([PLY(O,O) ]2B) のラジカル格子に穴を開けて導電性を高めます. この置換は,固体構造を大きく変化させることなく,電気的特性を改善します.

科学分野:

マテリアルサイエンス材料科学
オーガニック・エレクトロニクス
固体化学固体化学

背景:

有機導体とは,金属に似た電気伝導性を有する材料です.
スピロビス (spiro-bis) フェナレニル (phenalenyl) ボロン基 ([PLY ((O,O) ]2B) は,ユニークなスピン特性を有する宿主格子を形成する.
ドーピングは,材料の電子特性を調整するための一般的な戦略です.

研究の目的:

スピロ・ビス・フェナリル・ボロン・ラジカルベースの有機導体の導電性に対する置換ドーピングの効果を調査する.
ドーピングによる穴の導入が,電子構造と伝導機構にどのように影響するかを理解する.
共同結晶化による固体状態溶液の形成を調査する.

主な方法:

スパイロビス (((9-オキシドフェナレノン)) ボロン基 ([PLY (((O,O) ]2B) とスパイロビス (((9-オキシドフェナレノン)) ベリリウム ([PLY (((O,O) ]2Be) の共結晶化.
組成が異なる固体溶液の形成 ([PLY(O,O) ]2B(1-x) Be(x)).
電気伝導性とアクティベーションエネルギーの測定.

主要な成果:

ドーパント濃度 (x) の増加とともに,電気伝導性の体系的な増加.
導電プロセスの活性化エネルギーの減少.
ドーピング時に固体構造の最小限の混乱.
電子構造は共振バレンスの結合モデルと一致する.

結論:

[PLY(O,O) ]2Beによる代替ドーピングは,[PLY(O,O) ]2Bの有機導体に穴を開け,導電性を向上させます.
導電性とアクティベーションエネルギーの観測された変化は,電子構造の共振バレンスの結合モデルを支持する.
同結晶化は,調節可能な有機電子材料を作成するための実行可能な経路を提供します.

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